One could be forgiven for thinking Shadrach has a single track mind along which chickens run all day and all night. Truth is I have other interests, possibly as expensive as chickens. relative to income of course

I like music and even worse, I am, and have been since I earn't my first wage packet, interested in audio reproduction.
High Fidelity audio reproduction is being able to reproduce as closely as possible whatever is on ones chosen media. Forget about anything sounding like live music, physics makes this virtually impossible with a two transducers (speakers) or even multi speaker surround systems.
What is on your chosen media, record, CD, tape, file, can be measured and if one is slightly obsessed, the aim is to reproduce whatever is on the media with the greatets accuracy. There are as one might expect, problems. One such is it has been found through double blind listening tests (plus other means) that people don't in fact like the sound of a completely flat response over the entire frequency the medium can produce. Through various tests it has been established that people prefer a particular response curve and the dotted lines in the graphs below represent one such curve. There are others, but they tend to be failry close to the ones in the graphs.
on the left of the graphs (Y axis) is how loud the response is and at the bottom (X axis) is the frequency, low bass being far left and high treble being at the far right. The red and green lines represent the response of the particular piece of equipment being measured. The closer to the dotted line the response (red and green lines) are, the higher the fidelity to the preference curve and hopefully the better the music sounds.
One of the problems in letting Shadrach have a day of with his bank card and no financial guardian (wives/husbands, bank managers) is he is apt to buy stuff!
I did.

My headphones for serious music listening were twenty years old and a few weeks ago I stood on them and they broke. I've had them lashed up with duck tape and stuff but even the most parsimonious would admit they need replacing.
I did.
Given I live in a flat complex I can't see the other residents accepting the breakage of my headphones as an excuse for me playing music at 2am on my stereo system at 94dB; loud!
The first graph is a set of headphones. The second graph a set of ear buds which have at last come of age and become high fidelity at a truely astounding low cost; £25.00!
There are bits of computer software called Parametric equalizers with which one can adjust the frequency response of loudspeakers to bring the response of headphones, IEMs to bring them closer to the ideal response (the dotted line).
I have a parametric equalizer on all my computers which is what I use to play lossless audio files.
I expected the headphones to sound excellent but what has surprised me is just how good the £25.00 IEMs are.
There, that makes a change from off topic dogs and cats.
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